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Secondary School (English Medium) (5 to 8) Class 8 - CBSE Question Bank Solutions

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Find the values of the letters in the following and give reasons for the steps involved

   A  B

   x  3

-------

C  A  B

-------

[16] Playing with Numbers
Chapter: [16] Playing with Numbers
Concept: undefined >> undefined

Find the values of the letters in the following and give reasons for the steps involved.

   A  B

   x  5

-------

C  A B

------- 

[16] Playing with Numbers
Chapter: [16] Playing with Numbers
Concept: undefined >> undefined

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Find the values of the letters in the following and give reasons for the steps involved.

   A  B

   x   6

-------

 B  B  B

-------

[16] Playing with Numbers
Chapter: [16] Playing with Numbers
Concept: undefined >> undefined

Find the values of the letters in the following and give reasons for the steps involved.

   A  1

+ 1  B

-------

   B  0

-------  

[16] Playing with Numbers
Chapter: [16] Playing with Numbers
Concept: undefined >> undefined

Find the values of the letters in the following and give reasons for the steps involved.

  2  A  B

+ A  B  1

---------

   B  1  8

----------

[16] Playing with Numbers
Chapter: [16] Playing with Numbers
Concept: undefined >> undefined

Find the values of the letters in the following and give reasons for the steps involved.

   1  2  A

+ 6  A  B

---------

   A  0  9

---------

[16] Playing with Numbers
Chapter: [16] Playing with Numbers
Concept: undefined >> undefined

Verify commutativty of addition of rational numbers for each of the following pairs of rotional numbers:

\[\frac{- 11}{5} \text{and} \frac{4}{7}\]
[1] Rational Numbers
Chapter: [1] Rational Numbers
Concept: undefined >> undefined

Verify commutativty of addition of rational numbers for each of the following pairs of rotional numbers: 

\[\frac{4}{9} \text{and} \frac{7}{- 12}\]
[1] Rational Numbers
Chapter: [1] Rational Numbers
Concept: undefined >> undefined

Verify commutativty of addition of rational numbers for each of the following pairs of rotional numbers: 

\[\frac{- 3}{5} \text{and} \frac{- 2}{- 15}\]
[1] Rational Numbers
Chapter: [1] Rational Numbers
Concept: undefined >> undefined

Verify commutativty of addition of rational numbers for each of the following pairs of rotional numbers: 

\[\frac{2}{- 7} \text{and} \frac{12}{- 35}\]
[1] Rational Numbers
Chapter: [1] Rational Numbers
Concept: undefined >> undefined

Verify commutativty of addition of rational numbers for each of the following pairs of rotional numbers: 

\[4\ \text{and} \frac{- 3}{5}\]
[1] Rational Numbers
Chapter: [1] Rational Numbers
Concept: undefined >> undefined

Verify commutativty of addition of rational numbers for each of the following pairs of rotional numbers: 

\[- 4\ \text{and} \frac{4}{- 7}\]
[1] Rational Numbers
Chapter: [1] Rational Numbers
Concept: undefined >> undefined

Using commutativity and associativity of addition of rational numbers, express each of the following as a rational number:

\[\frac{2}{5} + \frac{7}{3} + \frac{- 4}{5} + \frac{- 1}{3}\]
[1] Rational Numbers
Chapter: [1] Rational Numbers
Concept: undefined >> undefined

Using commutativity and associativity of addition of rational numbers, express each of the following as a rational number:

\[\frac{3}{7} + \frac{- 4}{9} + \frac{- 11}{7} + \frac{7}{9}\]
[1] Rational Numbers
Chapter: [1] Rational Numbers
Concept: undefined >> undefined

Using commutativity and associativity of addition of rational numbers, express each of the following as a rational number:

\[\frac{2}{5} + \frac{8}{3} + \frac{- 11}{15} + \frac{4}{5} + \frac{- 2}{3}\]
[1] Rational Numbers
Chapter: [1] Rational Numbers
Concept: undefined >> undefined

Using commutativity and associativity of addition of rational numbers, express each of the following as a rational number:

\[\frac{4}{7} + 0 + \frac{- 8}{9} + \frac{- 13}{7} + \frac{17}{21}\]
[1] Rational Numbers
Chapter: [1] Rational Numbers
Concept: undefined >> undefined

Find the  cubes of the number  7 .

[6] Cubes and Cube Roots
Chapter: [6] Cubes and Cube Roots
Concept: undefined >> undefined

Find the  cubes of the number 12 .

[6] Cubes and Cube Roots
Chapter: [6] Cubes and Cube Roots
Concept: undefined >> undefined

Find the  cubes of the number 16 .

[6] Cubes and Cube Roots
Chapter: [6] Cubes and Cube Roots
Concept: undefined >> undefined

Find the  cubes of the number 21 .

[6] Cubes and Cube Roots
Chapter: [6] Cubes and Cube Roots
Concept: undefined >> undefined
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